| Discovery | |
|---|---|
| Discovered by | Sato et al.[1] |
| Discovery site | Okayama Planet Search Program, Japan |
| Discovery date | February 19, 2008 |
| radial velocity | |
| Orbital characteristics | |
| 0.81 AU (121 million km) | |
| Eccentricity | 0 |
| 184.02 ± 0.18 d | |
| 2,452,335.4 ± 1.1 | |
| Star | 41 Lyncis |
41 Lyncis b (abbreviated 41 Lyn b), also designated HD 81688 b and named Arkas /ˈɑːrkəs/,[2] is an extrasolar planet approximately 280 light-years from Earth in the constellation of Ursa Major.
A gas giant with a minimum mass 2.7 times that of Jupiter, it orbits the K-type star 41 Lyncis with an orbital period of 184 days (corresponding to a semi-major axis of 0.81 AU). It was discovered and announced by Bun'ei Sato on February 19, 2008.[1]